6-Ethoxy-4-hydroxyquinoline-3-carboxylic acid CAS 303121-10-0
| CAS No. | 303121-10-0 |
| Molecular Formula | C12H11NO4 |
| Molecular Weight | 233.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 6-Ethoxy-4-hydroxyquinoline-3-carboxylic acid is closely related to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies 6-Ethoxy-4-hydroxyquinoline-3-carboxylic acid (CAS 303121-10-0), a certified reference material (molecular formula C12H11NO4, MW 233.22 g/mol) for analytical method development and quality control.
6-Ethoxy-4-hydroxyquinoline-3-carboxylic acid (C12H11NO4) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C12H11NO4 |
| Molecular Weight | 233.22 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 1 |
Related Ethoxy Standards
- 8-ethoxy-4-hydroxyquinoline-3-carboxylic acid (CAS 111185-99-0)
- 2-(2-((1-Ethoxy-1-oxopropan-2-yl)amino)-2-oxoethoxy)acetic acid (CAS 1397000-27-9)
- 5-Ethoxy-2-phenyl-1,3-oxazole-4-carboxylic acid (CAS 54644-12-1)
- 6-Ethoxy-4-oxo-1,4-dihydroquinoline-3-carboxylic acid (CAS 51726-50-2)
- 8-Ethoxy-4-oxo-1,4-dihydroquinoline-3-carboxylic acid (CAS 303121-05-3)
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- 4-Ethoxy-1-ethyl-1h-indole-2-carboxylic acid (CAS 1017062-78-0)
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Recommended Standards
- 6-Amino-1-(4-methoxyphenyl)pyrimidine-2,4(1H,3H)-dione (CAS 60664-01-9)
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- 6-Hydroxy-2-phenyldihydro-1H,5H-pyrazolo[1,2-a][1,2,4]triazole-1,3(2H)-dione (CAS 696656-68-5)
- 6,8-Dimethoxyquinoline-7-carboxylic acid (CAS 91570-01-3)
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- 5-Amino-2,3-difluorobenzoic acid (CAS 874838-32-1)
- Moxifloxacin Impurity 55 (CAS 53764-99-1)
- Riluzole Impurity 2 (CAS 752969-85-0)
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